1/* 2 * copyright (c) 2006 Oded Shimon <ods15@ods15.dyndns.org> 3 * 4 * This file is part of FFmpeg. 5 * 6 * FFmpeg is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2.1 of the License, or (at your option) any later version. 10 * 11 * FFmpeg is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with FFmpeg; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 19 */ 20 21#ifndef AVCODEC_VORBIS_H 22#define AVCODEC_VORBIS_H 23 24#include "avcodec.h" 25 26extern const float ff_vorbis_floor1_inverse_db_table[256]; 27extern const float * const ff_vorbis_vwin[8]; 28extern const uint8_t ff_vorbis_channel_layout_offsets[8][8]; 29#if FF_API_OLD_CHANNEL_LAYOUT 30extern const uint64_t ff_vorbis_channel_layouts[9]; 31#endif 32extern const AVChannelLayout ff_vorbis_ch_layouts[9]; 33 34typedef struct vorbis_floor1_entry { 35 uint16_t x; 36 uint16_t sort; 37 uint16_t low; 38 uint16_t high; 39} vorbis_floor1_entry; 40 41int ff_vorbis_ready_floor1_list(AVCodecContext *avctx, 42 vorbis_floor1_entry *list, int values); 43unsigned int ff_vorbis_nth_root(unsigned int x, unsigned int n); // x^(1/n) 44int ff_vorbis_len2vlc(uint8_t *bits, uint32_t *codes, unsigned num); 45void ff_vorbis_floor1_render_list(vorbis_floor1_entry * list, int values, 46 uint16_t *y_list, int *flag, 47 int multiplier, float * out, int samples); 48void ff_vorbis_inverse_coupling(float *mag, float *ang, intptr_t blocksize); 49 50#define ilog(i) av_log2(2*(i)) 51 52#endif /* AVCODEC_VORBIS_H */ 53